Nicholson Road Bridge (Denton County, Texas)Built 1925Pony truss bridge over Clear Creek on Nicholson Road in DentonReplaced by a concrete bridge. The original structure was relocated to the City of Trenton.

Nickajack Bridge (Macon County, North Carolina)Warren through truss bridge over Little Tennessee River on Little Tennessee River GreenwayOpen to pedestrians only

Nickel Plate Trail - Wabash River Bridge (Miami County, Indiana)one of the oldest rail lines in Indiana, this bridge was built by Nickel Plate Road(later Norfolk & Western, Norfolk Southern). Last used by Central Railroad of Indy, Now Railbanked and property of Indiana Trails FundThrough truss bridge over Wabash River on abandoned Norfolk Southern Railway, soon Nickel Plate Trail in PeruOpen to pedestrians on Nickle Plate Trail

Nickel Plate-St. Mary's River Bridge (Allen County, Indiana)Built in 1895 by the Nickel Plate RailroadCamelback through truss bridge over St Mary's River on Norfolk Southern RailwayOpen to traffic

Ninabuck Road Bridge (Dodge County, Wisconsin)Built ca. 1907; Replaced 1996 Reused in 2006 at Astico County ParkLost Pratt through truss bridge over Crawfish River on Ninabuck Road in Town of ElbaReplaced by new bridge and reused in Astico County Park

Nine Span Bridge (Lake County, Indiana)Built 1935, rehabilitated in 1984, to be demolished 2013Lost through truss bridge over Gibson Rail Yard on Indianapolis Blvd. in HammondDemolished and replaced.

Nineteenth Street Bridge (Denver County, Colorado)Built 1888 by the Missouri Valley Bridge & Iron Works; rehabilitated
1965; closed to traffic 1986; new bridge built 1992Two-span wrought-iron through truss bridge over South Platte River on 19th Street in DenverOpen to pedestrians only

Nineveh Bridge (Adair County, Missouri)Built 1885; replaced 1989Lost through truss bridge over Old Channel Chariton River on CR 175 east of ConnelsvilleReplaced by a concrete bridge

Ninnescah River Bridge (Sedgwick County, Kansas)Lost 2000Lost pony truss bridge over Ninnescah River, 1.8 mi. west of ClearwaterReplaced by a new bridge

Ninnescah River Bridge (Sumner County, Kansas)Built 1962Through truss bridge over Ninnescah River, 2.0 mi. east and 3.8 mi. south of Belle PlaineOpen to traffic

Ninth Street Bridge (Lynchburg, Virginia)Built 1817Lost Through truss bridge over James River on Ninth StreetDestroyed by flood in 1870 and 1877

Ninth Street Swing Bridge (Will County, Illinois)Lost Through truss bridge over Sanitary & Ship Canal on Old 9th StreetReplaced by a new bridge in 1972

Niobrara River Bridge (Sheridan County, Nebraska)Built 1981Pony truss bridge over Niobrara River on County HighwayOpen to traffic

Niobrara Trail - Niobrara River Bridge (Knox County, Nebraska)Built 1929 by the Chicago and North Western Railway, replacing a previous structure. Abandoned in the 1970s. Reopened to pedestrians.Warren through truss bridge over Niobrara River on Niobrara TrailOpen to pedestrians

Nipmuck Trail Iron Bridge North (Tolland County, Connecticut)Built 1914 by the American Bridge Co.; trusses relocated here 1997Warren pony truss with alternating verticals bridge over Fenton River on Nipmuck Trail/Fenton River TrailOpen to pedestrians only

Nipmuck Trail Iron Bridge South (Tolland County, Connecticut)Built 1901 by the Berlin Construction Co.; narrowed and relocated 1997Warren pony truss with no verticals bridge over Fenton River on Nipmuck Trail/Fenton River TrailOpen to pedestrians only

NIR - Berrien Springs Bridge (Berrien County, Michigan)Removed ca. 1930sLost Pratt through truss bridge over St. Joseph River on Southern Michigan RailwayRemoved but not replaced, abutments still extant

Nishnabotna River Bridge (Audubon County, Iowa)Built 1977Pony truss bridge over Nishnabotna River on Lark AvenueOpen to traffic

Nishnabotna River Bridge (Audubon County, Iowa)(Main design: Pratt through truss)Built 1958Through truss bridge over Nishnabotna River on 250 StOpen to traffic

Nishnabotna River Bridge (Audubon County, Iowa)Built 1924Pony truss bridge over Nishnabotna River on Mockingbrid AvenueDerelict/abandoned

Nishnabotna River Bridge (Crawford County, Iowa)Built 1945Bowstring pony truss bridge over Nishnabotna Creek on 300th Street near ManillaOpen to traffic

Nishnabotna River Bridge (Mills County, Iowa)Located southwest of Henderson in northwestern Mills County, this rigid-connected pony truss carries a paved county road (once a part of a state highway) over the Nishnabotna River. The bridge is comprised of two skewed trusses, each configured as aOther deck truss bridge over West Nishnabotna River Bridge on County Road M-16/370th StreetOpen to traffic

NJ35 Bridge (Middlesex County, New Jersey)Built 1924; rehabilitated 1989Through truss bridge over North Jersey Coast Line on Northbound NJ 35 in SayrevilleOpen to traffic

NJT - DB Draw (Hudson County, New Jersey)Built 1899; removed from service 2002Pratt through truss bridge over Hackensack River on Erie Railroad (abandoned)Closed to all traffic

NJT - Delair Bridge (Philadelphia County, Pennsylvania)(Main design: Polygonal Warren through truss with all verticals)Built 1896 as a swing bridge, lift span added in 1960; was the first bridge from Philadelphia to New JerseyPolygonal Warren through truss with all verticals bridge over Delaware River on Conrail Shared Assets Operations (formerly Pennsylvania RR)Open to traffic

NJT - Hogback Bridge (Somerset County, New Jersey)Built 2003Through truss bridge over North Branch Raritan River on New Jersey TransitOpen to traffic

NJT - HX Draw (Bergen County, New Jersey)Built 1911Warren through truss bascule bridge over Hackensack River on Railroad (NJ Transit Bergen County Line)Open to traffic

NJT - Upper Hackensack Lift Bridge (Hudson County, New Jersey)Built 1959 to replace earlier 1901 bridgePolygonal Warren through truss with all verticals bridge over Hackensack River on New Jersey TransitOpen to traffic

NKP - Cuyahoga River Bridge (Cuyahoga County, Ohio)Built 1956Pennsylvania through truss bridge over Cuyahoga River on Nickel Plate RROpen to traffic

NKP - Cuyahoga River Bridge (Old) (Cuyahoga County, Ohio)Built 1907; Replaced in 1944 -1956Lost Warren through truss bridge over Cuyahoga River on New York Chicago & St Louis RRReplaced by a new bridge

NKP - Cuyahoga River Bridge (Older) (Cuyahoga County, Ohio)Bridge constructed in 1882 replaced in the 1904 with a Scherzer type bascule bridge and replaced in 1944 with a vertical lift bridgeLost Pratt through truss bridge over Cuyahoga River on Nickel Plate RRNo longer exists

NKP - Old Ashtabula River Bridge (Ashtabula County, Ohio)Built 1882, replaced 1902Lost Whipple deck truss bridge over Ashtabula River on New York, Chicago, & St. Louis Railroad in AshtabulaReplaced by a new bridge

Noah's Ark Covered Bridge 25-83-01x (Platte County, Missouri)Built 1878; bypassed by new bridge in 1957; damaged by flood in July 1965 and dismantledLost covered bridge over Little Platte River on Route BDestroyed by flood

Noakes Bridge (Nodaway County, Missouri)Built 1891-92 by the St. Joseph Bridge & Iron Co.; replaced 1991Lost through truss over One Hundred and Two River on 130th Street (CR 156) southwest of HopkinsReplaced by a concrete bridge

Norfork Bridge (Baxter County, Arkansas)Construction started Aug. 21, 1936, by the Vincennes Steel Company; dedicated June 17, 1937; Demolished September 2014Lost four-span deck truss bridge over North Fork White River on AR 5 at NorforkReplaced by a new bridge

Norfork Railroad Bridge (Baxter County, Arkansas)(Main design: Parker through truss)Built ca. 1909Three-span through truss bridge over North Fork White River and Prospect Street on the railroad at NorforkOpen to railroad traffic